The JX-03 only has 16 slots for user presets and in the editor you can save an unlimited number (yes you can manage your Boutique presets in the file system but I think this is more straightforward). Also there are hundreds of shared patches published by the users of the editors. For the JU-06 and the JP-08 many factory presets from the original Juno 106 and Jupiter 8 that are missing in the Boutiques have been converted and published.